//go:build unit

package handler

import (
	"bytes"
	"context"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"testing"
	"time"

	"github.com/Wei-Shaw/sub2api/internal/config"
	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
	middleware2 "github.com/Wei-Shaw/sub2api/internal/server/middleware"
	"github.com/Wei-Shaw/sub2api/internal/service"
	"github.com/gin-gonic/gin"
	"github.com/stretchr/testify/require"
)

type userHandlerRepoStub struct {
	user       *service.User
	identities []service.UserAuthIdentityRecord
}

func (s *userHandlerRepoStub) Create(context.Context, *service.User) error { return nil }
func (s *userHandlerRepoStub) GetByID(context.Context, int64) (*service.User, error) {
	cloned := *s.user
	return &cloned, nil
}
func (s *userHandlerRepoStub) GetByEmail(context.Context, string) (*service.User, error) {
	cloned := *s.user
	return &cloned, nil
}
func (s *userHandlerRepoStub) GetFirstAdmin(context.Context) (*service.User, error) {
	cloned := *s.user
	return &cloned, nil
}
func (s *userHandlerRepoStub) Update(_ context.Context, user *service.User) error {
	cloned := *user
	s.user = &cloned
	return nil
}
func (s *userHandlerRepoStub) Delete(context.Context, int64) error { return nil }
func (s *userHandlerRepoStub) GetUserAvatar(context.Context, int64) (*service.UserAvatar, error) {
	if s.user == nil || s.user.AvatarURL == "" {
		return nil, nil
	}
	return &service.UserAvatar{
		StorageProvider: s.user.AvatarSource,
		URL:             s.user.AvatarURL,
		ContentType:     s.user.AvatarMIME,
		ByteSize:        s.user.AvatarByteSize,
		SHA256:          s.user.AvatarSHA256,
	}, nil
}
func (s *userHandlerRepoStub) UpsertUserAvatar(_ context.Context, _ int64, input service.UpsertUserAvatarInput) (*service.UserAvatar, error) {
	s.user.AvatarURL = input.URL
	s.user.AvatarSource = input.StorageProvider
	s.user.AvatarMIME = input.ContentType
	s.user.AvatarByteSize = input.ByteSize
	s.user.AvatarSHA256 = input.SHA256
	return &service.UserAvatar{
		StorageProvider: input.StorageProvider,
		URL:             input.URL,
		ContentType:     input.ContentType,
		ByteSize:        input.ByteSize,
		SHA256:          input.SHA256,
	}, nil
}
func (s *userHandlerRepoStub) DeleteUserAvatar(context.Context, int64) error {
	s.user.AvatarURL = ""
	s.user.AvatarSource = ""
	s.user.AvatarMIME = ""
	s.user.AvatarByteSize = 0
	s.user.AvatarSHA256 = ""
	return nil
}
func (s *userHandlerRepoStub) List(context.Context, pagination.PaginationParams) ([]service.User, *pagination.PaginationResult, error) {
	return nil, nil, nil
}
func (s *userHandlerRepoStub) ListWithFilters(context.Context, pagination.PaginationParams, service.UserListFilters) ([]service.User, *pagination.PaginationResult, error) {
	return nil, nil, nil
}
func (s *userHandlerRepoStub) UpdateBalance(context.Context, int64, float64) error { return nil }
func (s *userHandlerRepoStub) DeductBalance(context.Context, int64, float64) error { return nil }
func (s *userHandlerRepoStub) UpdateConcurrency(context.Context, int64, int) error { return nil }
func (s *userHandlerRepoStub) ExistsByEmail(context.Context, string) (bool, error) { return false, nil }
func (s *userHandlerRepoStub) RemoveGroupFromAllowedGroups(context.Context, int64) (int64, error) {
	return 0, nil
}
func (s *userHandlerRepoStub) AddGroupToAllowedGroups(context.Context, int64, int64) error {
	return nil
}
func (s *userHandlerRepoStub) GetLatestUsedAtByUserIDs(context.Context, []int64) (map[int64]*time.Time, error) {
	return map[int64]*time.Time{}, nil
}
func (s *userHandlerRepoStub) GetLatestUsedAtByUserID(context.Context, int64) (*time.Time, error) {
	return nil, nil
}
func (s *userHandlerRepoStub) RemoveGroupFromUserAllowedGroups(context.Context, int64, int64) error {
	return nil
}
func (s *userHandlerRepoStub) UpdateTotpSecret(context.Context, int64, *string) error { return nil }
func (s *userHandlerRepoStub) EnableTotp(context.Context, int64) error                { return nil }
func (s *userHandlerRepoStub) DisableTotp(context.Context, int64) error               { return nil }
func (s *userHandlerRepoStub) ListUserAuthIdentities(context.Context, int64) ([]service.UserAuthIdentityRecord, error) {
	out := make([]service.UserAuthIdentityRecord, len(s.identities))
	copy(out, s.identities)
	return out, nil
}

func TestUserHandlerUpdateProfileReturnsAvatarURL(t *testing.T) {
	gin.SetMode(gin.TestMode)

	repo := &userHandlerRepoStub{
		user: &service.User{
			ID:       11,
			Email:    "handler-avatar@example.com",
			Username: "handler-avatar",
			Role:     service.RoleUser,
			Status:   service.StatusActive,
		},
	}
	handler := NewUserHandler(service.NewUserService(repo, nil, nil, nil), nil, nil, nil)

	body := []byte(`{"avatar_url":"https://cdn.example.com/avatar.png"}`)
	recorder := httptest.NewRecorder()
	c, _ := gin.CreateTestContext(recorder)
	c.Request = httptest.NewRequest(http.MethodPut, "/api/v1/user", bytes.NewReader(body))
	c.Request.Header.Set("Content-Type", "application/json")
	c.Set(string(middleware2.ContextKeyUser), middleware2.AuthSubject{UserID: 11})

	handler.UpdateProfile(c)

	require.Equal(t, http.StatusOK, recorder.Code)

	var resp struct {
		Code int `json:"code"`
		Data struct {
			AvatarURL string `json:"avatar_url"`
			Username  string `json:"username"`
		} `json:"data"`
	}
	require.NoError(t, json.Unmarshal(recorder.Body.Bytes(), &resp))
	require.Equal(t, 0, resp.Code)
	require.Equal(t, "https://cdn.example.com/avatar.png", resp.Data.AvatarURL)
	require.Equal(t, "handler-avatar", resp.Data.Username)
}

func TestUserHandlerGetProfileReturnsIdentitySummaries(t *testing.T) {
	gin.SetMode(gin.TestMode)

	verifiedAt := time.Date(2026, 4, 20, 8, 30, 0, 0, time.UTC)
	repo := &userHandlerRepoStub{
		user: &service.User{
			ID:       11,
			Email:    "identity@example.com",
			Username: "identity-user",
			Role:     service.RoleUser,
			Status:   service.StatusActive,
		},
		identities: []service.UserAuthIdentityRecord{
			{
				ProviderType:    "linuxdo",
				ProviderKey:     "linuxdo",
				ProviderSubject: "linuxdo-subject-123456",
				VerifiedAt:      &verifiedAt,
				Metadata: map[string]any{
					"username": "linuxdo-handle",
				},
			},
			{
				ProviderType:    "oidc",
				ProviderKey:     "https://issuer.example.com",
				ProviderSubject: "oidc-user-abc",
				Metadata: map[string]any{
					"suggested_display_name": "OIDC Display",
				},
			},
		},
	}
	handler := NewUserHandler(service.NewUserService(repo, nil, nil, nil), nil, nil, nil)

	recorder := httptest.NewRecorder()
	c, _ := gin.CreateTestContext(recorder)
	c.Request = httptest.NewRequest(http.MethodGet, "/api/v1/user/profile", nil)
	c.Set(string(middleware2.ContextKeyUser), middleware2.AuthSubject{UserID: 11})

	handler.GetProfile(c)

	require.Equal(t, http.StatusOK, recorder.Code)

	var resp struct {
		Code int `json:"code"`
		Data struct {
			Identities struct {
				Email struct {
					Bound       bool   `json:"bound"`
					BoundCount  int    `json:"bound_count"`
					DisplayName string `json:"display_name"`
				} `json:"email"`
				LinuxDo struct {
					Bound       bool   `json:"bound"`
					BoundCount  int    `json:"bound_count"`
					DisplayName string `json:"display_name"`
					ProviderKey string `json:"provider_key"`
				} `json:"linuxdo"`
				OIDC struct {
					Bound       bool   `json:"bound"`
					DisplayName string `json:"display_name"`
					ProviderKey string `json:"provider_key"`
				} `json:"oidc"`
				WeChat struct {
					Bound         bool   `json:"bound"`
					CanBind       bool   `json:"can_bind"`
					BindStartPath string `json:"bind_start_path"`
				} `json:"wechat"`
			} `json:"identities"`
		} `json:"data"`
	}
	require.NoError(t, json.Unmarshal(recorder.Body.Bytes(), &resp))
	require.Equal(t, 0, resp.Code)
	require.True(t, resp.Data.Identities.Email.Bound)
	require.Equal(t, 1, resp.Data.Identities.Email.BoundCount)
	require.Equal(t, "identity@example.com", resp.Data.Identities.Email.DisplayName)
	require.True(t, resp.Data.Identities.LinuxDo.Bound)
	require.Equal(t, 1, resp.Data.Identities.LinuxDo.BoundCount)
	require.Equal(t, "linuxdo-handle", resp.Data.Identities.LinuxDo.DisplayName)
	require.Equal(t, "linuxdo", resp.Data.Identities.LinuxDo.ProviderKey)
	require.True(t, resp.Data.Identities.OIDC.Bound)
	require.Equal(t, "OIDC Display", resp.Data.Identities.OIDC.DisplayName)
	require.Equal(t, "https://issuer.example.com", resp.Data.Identities.OIDC.ProviderKey)
	require.False(t, resp.Data.Identities.WeChat.Bound)
	require.True(t, resp.Data.Identities.WeChat.CanBind)
	require.Contains(t, resp.Data.Identities.WeChat.BindStartPath, "/api/v1/auth/oauth/wechat/start")
}

func TestUserHandlerGetProfileReturnsLegacyCompatibilityFields(t *testing.T) {
	gin.SetMode(gin.TestMode)

	verifiedAt := time.Date(2026, 4, 20, 8, 30, 0, 0, time.UTC)
	repo := &userHandlerRepoStub{
		user: &service.User{
			ID:           21,
			Email:        "legacy-profile@example.com",
			Username:     "linuxdo-handle",
			Role:         service.RoleUser,
			Status:       service.StatusActive,
			AvatarURL:    "https://cdn.example.com/linuxdo.png",
			AvatarSource: "remote_url",
		},
		identities: []service.UserAuthIdentityRecord{
			{
				ProviderType:    "linuxdo",
				ProviderKey:     "linuxdo",
				ProviderSubject: "linuxdo-subject-21",
				VerifiedAt:      &verifiedAt,
				Metadata: map[string]any{
					"username": "linuxdo-handle",
				},
			},
		},
	}
	handler := NewUserHandler(service.NewUserService(repo, nil, nil, nil), nil, nil, nil)

	recorder := httptest.NewRecorder()
	c, _ := gin.CreateTestContext(recorder)
	c.Request = httptest.NewRequest(http.MethodGet, "/api/v1/user/profile", nil)
	c.Set(string(middleware2.ContextKeyUser), middleware2.AuthSubject{UserID: 21})

	handler.GetProfile(c)

	require.Equal(t, http.StatusOK, recorder.Code)

	var resp struct {
		Code int            `json:"code"`
		Data map[string]any `json:"data"`
	}
	require.NoError(t, json.Unmarshal(recorder.Body.Bytes(), &resp))
	require.Equal(t, 0, resp.Code)
	require.Equal(t, true, resp.Data["email_bound"])
	require.Equal(t, true, resp.Data["linuxdo_bound"])
	require.Equal(t, false, resp.Data["oidc_bound"])
	require.Equal(t, false, resp.Data["wechat_bound"])
	require.Equal(t, "https://cdn.example.com/linuxdo.png", resp.Data["avatar_url"])

	avatarSource, ok := resp.Data["avatar_source"].(map[string]any)
	require.True(t, ok)
	require.Equal(t, "linuxdo", avatarSource["provider"])
	require.Equal(t, "linuxdo", avatarSource["source"])

	authBindings, ok := resp.Data["auth_bindings"].(map[string]any)
	require.True(t, ok)
	linuxdoBinding, ok := authBindings["linuxdo"].(map[string]any)
	require.True(t, ok)
	require.Equal(t, true, linuxdoBinding["bound"])
	require.Equal(t, "linuxdo", linuxdoBinding["provider"])

	identityBindings, ok := resp.Data["identity_bindings"].(map[string]any)
	require.True(t, ok)
	emailBinding, ok := identityBindings["email"].(map[string]any)
	require.True(t, ok)
	require.Equal(t, true, emailBinding["bound"])

	profileSources, ok := resp.Data["profile_sources"].(map[string]any)
	require.True(t, ok)
	usernameSource, ok := profileSources["username"].(map[string]any)
	require.True(t, ok)
	require.Equal(t, "linuxdo", usernameSource["provider"])
	require.Equal(t, "linuxdo", usernameSource["source"])
}

type userHandlerEmailCacheStub struct {
	data *service.VerificationCodeData
}

func (s *userHandlerEmailCacheStub) GetVerificationCode(context.Context, string) (*service.VerificationCodeData, error) {
	return s.data, nil
}

func (s *userHandlerEmailCacheStub) SetVerificationCode(context.Context, string, *service.VerificationCodeData, time.Duration) error {
	return nil
}

func (s *userHandlerEmailCacheStub) DeleteVerificationCode(context.Context, string) error {
	return nil
}

func (s *userHandlerEmailCacheStub) GetNotifyVerifyCode(context.Context, string) (*service.VerificationCodeData, error) {
	return nil, nil
}

func (s *userHandlerEmailCacheStub) SetNotifyVerifyCode(context.Context, string, *service.VerificationCodeData, time.Duration) error {
	return nil
}

func (s *userHandlerEmailCacheStub) DeleteNotifyVerifyCode(context.Context, string) error {
	return nil
}

func (s *userHandlerEmailCacheStub) GetPasswordResetToken(context.Context, string) (*service.PasswordResetTokenData, error) {
	return nil, nil
}

func (s *userHandlerEmailCacheStub) SetPasswordResetToken(context.Context, string, *service.PasswordResetTokenData, time.Duration) error {
	return nil
}

func (s *userHandlerEmailCacheStub) DeletePasswordResetToken(context.Context, string) error {
	return nil
}

func (s *userHandlerEmailCacheStub) IsPasswordResetEmailInCooldown(context.Context, string) bool {
	return false
}

func (s *userHandlerEmailCacheStub) SetPasswordResetEmailCooldown(context.Context, string, time.Duration) error {
	return nil
}

func (s *userHandlerEmailCacheStub) GetNotifyCodeUserRate(context.Context, int64) (int64, error) {
	return 0, nil
}

func (s *userHandlerEmailCacheStub) IncrNotifyCodeUserRate(context.Context, int64, time.Duration) (int64, error) {
	return 0, nil
}

func TestUserHandlerBindEmailIdentityReturnsProfileResponse(t *testing.T) {
	gin.SetMode(gin.TestMode)

	repo := &userHandlerRepoStub{
		user: &service.User{
			ID:       11,
			Email:    "legacy-user" + service.LinuxDoConnectSyntheticEmailDomain,
			Username: "legacy-user",
			Role:     service.RoleUser,
			Status:   service.StatusActive,
		},
	}
	emailCache := &userHandlerEmailCacheStub{
		data: &service.VerificationCodeData{
			Code:      "123456",
			CreatedAt: time.Now().UTC(),
			ExpiresAt: time.Now().UTC().Add(10 * time.Minute),
		},
	}
	cfg := &config.Config{
		JWT: config.JWTConfig{
			Secret:     "test-secret",
			ExpireHour: 1,
		},
	}
	emailService := service.NewEmailService(nil, emailCache)
	authService := service.NewAuthService(nil, repo, nil, nil, cfg, nil, emailService, nil, nil, nil, nil)
	handler := NewUserHandler(service.NewUserService(repo, nil, nil, nil), authService, nil, nil)

	body := []byte(`{"email":"new@example.com","verify_code":"123456","password":"new-password"}`)
	recorder := httptest.NewRecorder()
	c, _ := gin.CreateTestContext(recorder)
	c.Request = httptest.NewRequest(http.MethodPost, "/api/v1/user/account-bindings/email", bytes.NewReader(body))
	c.Request.Header.Set("Content-Type", "application/json")
	c.Params = gin.Params{{Key: "provider", Value: "email"}}
	c.Set(string(middleware2.ContextKeyUser), middleware2.AuthSubject{UserID: 11})

	handler.BindEmailIdentity(c)

	require.Equal(t, http.StatusOK, recorder.Code)

	var resp struct {
		Code int `json:"code"`
		Data struct {
			Email      string `json:"email"`
			EmailBound bool   `json:"email_bound"`
		} `json:"data"`
	}
	require.NoError(t, json.Unmarshal(recorder.Body.Bytes(), &resp))
	require.Equal(t, 0, resp.Code)
	require.Equal(t, "new@example.com", resp.Data.Email)
	require.True(t, resp.Data.EmailBound)
}

func TestUserHandlerBindEmailIdentityRejectsWrongCurrentPasswordForBoundEmail(t *testing.T) {
	gin.SetMode(gin.TestMode)

	user := &service.User{
		ID:       11,
		Email:    "current@example.com",
		Username: "bound-user",
		Role:     service.RoleUser,
		Status:   service.StatusActive,
	}
	require.NoError(t, user.SetPassword("current-password"))

	repo := &userHandlerRepoStub{user: user}
	emailCache := &userHandlerEmailCacheStub{
		data: &service.VerificationCodeData{
			Code:      "123456",
			CreatedAt: time.Now().UTC(),
			ExpiresAt: time.Now().UTC().Add(10 * time.Minute),
		},
	}
	cfg := &config.Config{
		JWT: config.JWTConfig{
			Secret:     "test-secret",
			ExpireHour: 1,
		},
	}
	emailService := service.NewEmailService(nil, emailCache)
	authService := service.NewAuthService(nil, repo, nil, nil, cfg, nil, emailService, nil, nil, nil, nil)
	handler := NewUserHandler(service.NewUserService(repo, nil, nil, nil), authService, nil, nil)

	body := []byte(`{"email":"new@example.com","verify_code":"123456","password":"wrong-password"}`)
	recorder := httptest.NewRecorder()
	c, _ := gin.CreateTestContext(recorder)
	c.Request = httptest.NewRequest(http.MethodPost, "/api/v1/user/account-bindings/email", bytes.NewReader(body))
	c.Request.Header.Set("Content-Type", "application/json")
	c.Set(string(middleware2.ContextKeyUser), middleware2.AuthSubject{UserID: 11})

	handler.BindEmailIdentity(c)

	require.Equal(t, http.StatusBadRequest, recorder.Code)

	var resp struct {
		Code    int    `json:"code"`
		Message string `json:"message"`
		Reason  string `json:"reason"`
	}
	require.NoError(t, json.Unmarshal(recorder.Body.Bytes(), &resp))
	require.Equal(t, http.StatusBadRequest, resp.Code)
	require.Equal(t, "PASSWORD_INCORRECT", resp.Reason)
	require.Equal(t, "current password is incorrect", resp.Message)
	require.Equal(t, "current@example.com", repo.user.Email)
}

func TestUserHandlerStartIdentityBindingReturnsAuthorizeURL(t *testing.T) {
	gin.SetMode(gin.TestMode)

	repo := &userHandlerRepoStub{
		user: &service.User{
			ID:       11,
			Email:    "identity@example.com",
			Username: "identity-user",
			Role:     service.RoleUser,
			Status:   service.StatusActive,
		},
	}
	handler := NewUserHandler(service.NewUserService(repo, nil, nil, nil), nil, nil, nil)

	body := []byte(`{"provider":"wechat","redirect_to":"/settings/profile"}`)
	recorder := httptest.NewRecorder()
	c, _ := gin.CreateTestContext(recorder)
	c.Request = httptest.NewRequest(http.MethodPost, "/api/v1/user/auth-identities/bind/start", bytes.NewReader(body))
	c.Request.Header.Set("Content-Type", "application/json")
	c.Set(string(middleware2.ContextKeyUser), middleware2.AuthSubject{UserID: 11})

	handler.StartIdentityBinding(c)

	require.Equal(t, http.StatusOK, recorder.Code)

	var resp struct {
		Code int `json:"code"`
		Data struct {
			Provider           string `json:"provider"`
			AuthorizeURL       string `json:"authorize_url"`
			Method             string `json:"method"`
			UseBrowserRedirect bool   `json:"use_browser_redirect"`
		} `json:"data"`
	}
	require.NoError(t, json.Unmarshal(recorder.Body.Bytes(), &resp))
	require.Equal(t, 0, resp.Code)
	require.Equal(t, "wechat", resp.Data.Provider)
	require.Equal(t, "GET", resp.Data.Method)
	require.True(t, resp.Data.UseBrowserRedirect)
	require.Contains(t, resp.Data.AuthorizeURL, "/api/v1/auth/oauth/wechat/start")
	require.Contains(t, resp.Data.AuthorizeURL, "intent=bind_current_user")
	require.Contains(t, resp.Data.AuthorizeURL, "redirect=%2Fsettings%2Fprofile")
}
